<?php

import("@.Org.CommonTool");


class SessionTool{
    var $session_table  		= 	'';
    var $max_life_time  		= 	1800; // SESSION 有效期
    var $session_name   		= 	'';
    var $session_id     		= 	'';
    var $session_expiry 		= 	'';
    var $session_md5    		= 	'';
    var $session_cookie_path   	= 	'/';
    var $session_cookie_domain 	= 	'';
    var $session_cookie_secure 	= 	false;
    var $_ip   					= 	'';
    var $CommonModel			= 	'';
    var $_time 					= 	0;

    function __construct($session_table = 'ybr_session', $session_data_table = 'ybr_session_data', $session_name = 'ECS_ID', $session_id = ''){
        $this->SessionTool($session_table, $session_data_table, $session_name, $session_id);
    }

    function SessionTool($session_table, $session_data_table, $session_name = 'ECS_ID', $session_id = ''){
        //$GLOBALS['_SESSION'] 	= 	array();
		$this->CommonModel						=	new CommonModel();
        
        if (!empty($GLOBALS['cookie_path'])){
            $this->session_cookie_path 			= 	$GLOBALS['cookie_path'];
        }
        else{
            $this->session_cookie_path 			= 	'/';
        }

        if (!empty($GLOBALS['cookie_domain'])){
            $this->session_cookie_domain 		= 	$GLOBALS['cookie_domain'];
        }
        else{
            $this->session_cookie_domain 		= 	'';
        }

        if (!empty($GLOBALS['cookie_secure'])){
            $this->session_cookie_secure 		= 	$GLOBALS['cookie_secure'];
        }
        else{
            $this->session_cookie_secure 		= 	false;
        }

        $this->session_name       				=	$session_name;
        $this->session_table      				= 	$session_table;
        $this->session_data_table 				= 	$session_data_table;
        $this->_ip 								= 	real_ip();

        if ($session_id == '' && !empty($_COOKIE[$this->session_name])){
            $this->session_id 					= 	$_COOKIE[$this->session_name];
        }
        else{
            $this->session_id 					= 	$session_id;
        }
        
        if ($this->session_id){
            $tmp_session_id 					= 	substr($this->session_id, 0, 32);
            if ($this->gen_session_key($tmp_session_id) == substr($this->session_id, 32)){
                $this->session_id 				= 	$tmp_session_id;
            }
            else{
                $this->session_id 				= 	'';
            }
        }

        $this->_time 							= 	time();

        if ($this->session_id){
            $this->load_session();
        }
        else{
            $this->gen_session_id();
            setcookie($this->session_name, $this->session_id . $this->gen_session_key($this->session_id), 0, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);
        }
        register_shutdown_function(array(&$this, 'close_session'));
    }

    function gen_session_id(){
        $this->session_id = md5(uniqid(mt_rand(), true));
        return $this->insert_session();
    }

    function gen_session_key($session_id){
        static $ip = '';
        if ($ip == ''){
            $ip = substr($this->_ip, 0, strrpos($this->_ip, '.'));
        }
        return sprintf('%08x', crc32(ROOT_PATH . $ip . $session_id));
    }

    function insert_session(){
        return $this->CommonModel->query('INSERT INTO ' . $this->session_table . " (sesskey, expiry, ip, data) VALUES ('" . $this->session_id . "', '". $this->_time ."', '". $this->_ip ."', 'a:0:{}')");
    }

    function load_session(){
        $session 								= 	$this->CommonModel->getRow('SELECT userid, adminid, user_name, user_rank, discount, email, data, expiry FROM ' . $this->session_table . " WHERE sesskey = '" . $this->session_id . "'");
        if (empty($session)){
            $this->insert_session();

            $this->session_expiry = 0;
            $this->session_md5    				= 	'40cd750bba9870f18aada2478b24840a';
            //$GLOBALS['_SESSION']  = array();
        }
        else{
            if (!empty($session['data']) && $this->_time - $session['expiry'] <= $this->max_life_time){
                $this->session_expiry 			= 	$session['expiry'];
                $this->session_md5    			= 	md5($session['data']);
                $GLOBALS['_SESSION']  			= 	unserialize($session['data']);
                $GLOBALS['_SESSION']['user_id'] = 	$session['userid'];
                $GLOBALS['_SESSION']['admin_id'] 	= 	$session['adminid'];
                $GLOBALS['_SESSION']['user_name'] 	= 	$session['user_name'];
                $GLOBALS['_SESSION']['user_rank'] 	= 	$session['user_rank'];
                $GLOBALS['_SESSION']['discount'] 	= 	$session['discount'];
                $GLOBALS['_SESSION']['email'] 		= 	$session['email'];
            }
            else{
                $session_data = $this->CommonModel->getRow('SELECT data, expiry FROM ' . $this->session_data_table . " WHERE sesskey = '" . $this->session_id . "'");
                if (!empty($session_data['data']) && $this->_time - $session_data['expiry'] <= $this->max_life_time){
                    $this->session_expiry 			= 	$session_data['expiry'];
                    $this->session_md5    			= 	md5($session_data['data']);
                    $GLOBALS['_SESSION']  			= 	unserialize($session_data['data']);
                    $GLOBALS['_SESSION']['user_id'] 	= 	$session['userid'];
                    $GLOBALS['_SESSION']['admin_id'] 	= 	$session['adminid'];
                    $GLOBALS['_SESSION']['user_name'] 	= 	$session['user_name'];
                    $GLOBALS['_SESSION']['user_rank'] 	= 	$session['user_rank'];
                    $GLOBALS['_SESSION']['discount'] 	= 	$session['discount'];
                    $GLOBALS['_SESSION']['email'] 		= 	$session['email'];
                }
                else{
                    $this->session_expiry = 0;
                    $this->session_md5    				= 	'40cd750bba9870f18aada2478b24840a';
                    //$GLOBALS['_SESSION']  = array();
                }
            }
        }
    }

    function update_session(){
        $adminid 									= 	!empty($GLOBALS['_SESSION']['admin_id']) ? intval($GLOBALS['_SESSION']['admin_id']) : 0;
        $userid  									= 	!empty($GLOBALS['_SESSION']['user_id'])  ? intval($GLOBALS['_SESSION']['user_id'])  : 0;
        $user_name  								= 	!empty($GLOBALS['_SESSION']['user_name'])  ? trim($GLOBALS['_SESSION']['user_name'])  : 0;
        $user_rank  								= 	!empty($GLOBALS['_SESSION']['user_rank'])  ? intval($GLOBALS['_SESSION']['user_rank'])  : 0;
        $discount  									= 	!empty($GLOBALS['_SESSION']['discount'])  ? round($GLOBALS['_SESSION']['discount'], 2)  : 0;
        $email  									= 	!empty($GLOBALS['_SESSION']['email'])  ? trim($GLOBALS['_SESSION']['email'])  : 0;
        /* 不注销信息
         * unset($GLOBALS['_SESSION']['admin_id']);
        unset($GLOBALS['_SESSION']['user_id']);
        unset($GLOBALS['_SESSION']['user_name']);
        unset($GLOBALS['_SESSION']['user_rank']);
        unset($GLOBALS['_SESSION']['discount']);
        unset($GLOBALS['_SESSION']['email']);*/

        $data        			= 	serialize($GLOBALS['_SESSION']);
        $this->_time 			= 	time();

        if ($this->session_md5 == md5($data) && $this->_time < $this->session_expiry + 10){
            return true;
        }

        $data 					= 	addslashes($data);

        if (isset($data{255})){
            $this->CommonModel->autoReplace($this->session_data_table, array('sesskey' => $this->session_id, 'expiry' => $this->_time, 'data' => $data), array('expiry' => $this->_time,'data' => $data));
			$data 				= 	'';
        }
        return $this->CommonModel->query('UPDATE ' . $this->session_table . " SET expiry = '" . $this->_time . "', ip = '" . $this->_ip . "', userid = '" . $userid . "', adminid = '" . $adminid . "', user_name='" . $user_name . "', user_rank='" . $user_rank . "', discount='" . $discount . "', email='" . $email . "', data = '$data' WHERE sesskey = '" . $this->session_id . "' LIMIT 1");
    }

    function close_session(){
        $this->update_session();

        if (mt_rand(0, 2) == 2){
            $this->CommonModel->query('DELETE FROM ' . $this->session_data_table . ' WHERE expiry < ' . ($this->_time - $this->max_life_time));
        }

        if ((time() % 2) == 0){
            return $this->CommonModel->query('DELETE FROM ' . $this->session_table . ' WHERE expiry < ' . ($this->_time - $this->max_life_time));
        }
        return true;
    }

    function delete_spec_admin_session($adminid){
        if (!empty($GLOBALS['_SESSION']['admin_id']) && $adminid){
            return $this->CommonModel->query('DELETE FROM ' . $this->session_table . " WHERE adminid = '$adminid'");
        }
        else{
            return false;
        }
    }

    function destroy_session(){
        //$GLOBALS['_SESSION'] = array();

        setcookie($this->session_name, $this->session_id, 1, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);

        if (!empty($GLOBALS['ecs'])){
            $this->CommonModel->query('DELETE FROM ' . 'ybr_cart' . " WHERE session_id = '$this->session_id'");
        }

        $this->CommonModel->query('DELETE FROM ' . $this->session_data_table . " WHERE sesskey = '" . $this->session_id . "' LIMIT 1");

        return $this->CommonModel->query('DELETE FROM ' . $this->session_table . " WHERE sesskey = '" . $this->session_id . "' LIMIT 1");
    }

    function get_session_id(){
        return $this->session_id;
    }

    function get_users_count(){
        return $this->CommonModel->getOne('SELECT count(*) FROM ' . $this->session_table);
    }
}


























